#ifndef G711DECODER_H
#define G711DECODER_H
#include <cstdint>

const int16_t ALAW_MAX = 0xFFF;
const int16_t ALAW_BIAS = 0x84;

// A-law解码表
const int16_t aLawDecompressTable[256] = {
    -5504, -5248, -6016, -5760, -4480, -4224, -4992, -4736,
    -7552, -7296, -8064, -7808, -6528, -6272, -7040, -6784,
    -2752, -2624, -3008, -2880, -2240, -2112, -2496, -2368,
    -3776, -3648, -4032, -3904, -3264, -3136, -3520, -3392,
    -22016, -20992, -24064, -23040, -17920, -16896, -19968, -18944,
    -30208, -29184, -32256, -31232, -26112, -25088, -28160, -27136,
    -11008, -10496, -12032, -11520, -8960, -8448, -9984, -9472,
    -15104, -14592, -16128, -15616, -13056, -12544, -14080, -13568,
    -344, -328, -376, -360, -280, -264, -312, -296,
    -472, -456, -504, -488, -408, -392, -440, -424,
    -88, -72, -120, -104, -24, -8, -56, -40,
    -216, -200, -248, -232, -152, -136, -184, -168,
    -1376, -1312, -1504, -1440, -1120, -1056, -1248, -1184,
    -1888, -1824, -2016, -1952, -1632, -1568, -1760, -1696,
    -688, -656, -752, -720, -560, -528, -624, -592,
    -944, -912, -1008, -976, -816, -784, -880, -848,
    5504, 5248, 6016, 5760, 4480, 4224, 4992, 4736,
    7552, 7296, 8064, 7808, 6528, 6272, 7040, 6784,
    2752, 2624, 3008, 2880, 2240, 2112, 2496, 2368,
    3776, 3648, 4032, 3904, 3264, 3136, 3520, 3392,
    22016, 20992, 24064, 23040, 17920, 16896, 19968, 18944,
    30208, 29184, 32256, 31232, 26112, 25088, 28160, 27136,
    11008, 10496, 12032, 11520, 8960, 8448, 9984, 9472,
    15104, 14592, 16128, 15616, 13056, 12544, 14080, 13568,
    344, 328, 376, 360, 280, 264, 312, 296,
    472, 456, 504, 488, 408, 392, 440, 424,
    88, 72, 120, 104, 24, 8, 56, 40,
    216, 200, 248, 232, 152, 136, 184, 168,
    1376, 1312, 1504, 1440, 1120, 1056, 1248, 1184,
    1888, 1824, 2016, 1952, 1632, 1568, 1760, 1696,
    688, 656, 752, 720, 560, 528, 624, 592,
    944, 912, 1008, 976, 816, 784, 880, 848
};

class G711Decoder
{
public:
    // Function to decode a G.711 μ-law sample to PCM
    static int16_t decodeMuLaw(uint8_t muLawByte);

    // Function to decode a G.711 A-law sample to PCM
    static int16_t decodeALaw(uint8_t aLawByte);

    // Function to decode a G.711 A-law sample to PCM
    static int16_t decodeALaw1(uint8_t a_val);

    // Function to decode a G.711 A-law sample to PCM
    static int16_t decodeALaw2(uint8_t a_val);
    // Function to decode a G.711 A-law sample to PCM
    static int16_t decodeALaw3(uint8_t a_val);
};

#endif // G711DECODER_H
